Open AccessRegulation of miR-34b/c-targeted gene expression program by SUMOylation
Author(s) -
Yijia Li,
Li Du,
Grace Aldana-Masangkay,
Xiuli Wang,
Ryan Urak,
Stephen J. Forman,
Steven T. Rosen,
Yuan Chen
Publication year - 2018
Publication title -
nucleic acids research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 9.008
H-Index - 537
eISSN - 1362-4954
pISSN - 0305-1048
DOI - 10.1093/nar/gky484
Subject(s) - sumo protein , biology , microrna , regulation of gene expression , gene expression , carcinogenesis , zinc finger , gene , microbiology and biotechnology , mutagenesis , genetics , gene expression profiling , computational biology , mutation , transcription factor , ubiquitin
The miR-34 family of microRNAs suppresses the expression of proteins involved in pluripotency and oncogenesis. miR-34 expression is frequently reduced in cancers; however, the regulation of their expression is not well understood. We used genome-wide miRNA profiling and mechanistic analysis to show that SUMOylation regulates miR-34b/c expression, which impacts the expression of c-Myc and other tested miR-34 targets. We used site-directed mutagenesis and other methods to show that protein kinase B (also known as Akt) phosphorylation of FOXO3a plays an important role in SUMOylation-dependent expression of miR-34b/c. This study reveals how the miR-34-targeted gene expression program is regulated by SUMOylation and shows that SUMOylation need not regulate target proteins through direct modification, but instead can act through the expression of their targeting miRNAs.